Apparently, his preferred trade destinations are the Nets, the Sixers, the Heat and the Bucks. Obviously, the Rockets may trade him to a different team, like the Spurs did with Kawhi or the Cavs with Kyrie.
Imo, the Nets package is a bunch of role players + LeVert who's nothing special either. Not to mention, he's injury prone.
If I were the Rockets, I'd try to trade him to the Sixers for Simmons + whatever else I could get. I believe Simmons is the best asset they can realistically hope to get for Harden.
The Bucks traded away practically all their picks in the Jrue Holiday deal. They can offer Middleton + DDV + Wilson (filler) + pick swaps. If the Rockets want vets over picks, the Bucks might have a chance. For instance, the Spurs wanted vets when they traded Kawhi. Don't think it will happen, just saying.
The Lakers got nothing to offer. No way they trade for Harden. I included them in the poll only because they are the Lakers.